Phonograph-record.



PATENTED DEC. 11, 1906.

V. M. HARRIS. PHONOGRAPH RECORD. APPLICATION FILED APB.1 1.1904.

UNITED STATES PATENT OFFICE.

VARIAN M. HARRIS. OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-FIFTH TO ROBERT BURNS, OF

CHICAGO, ILLINOIS.

PHONOGRAPH-RECORDY.

Specification of Letters Patent.

Patented Dec. 11, 1906.

dppn'cation filed llipril 11,1904. Serial No. 202.514.

.new and useful Improvements in PhonographRe'cords, of which the following is a specification.

The present invention relates to that type of permanent cylindrical phonograph-records in wh ch a thin cylindrical record-film is carried upon a cylindrical carrying-mandrel that is adapted to have engagement with the ordinary-tapering spindle or mandrel of a phonograph; and the object of the present improvement is to provide a simple and effi cient structural formation and combination of parts in which a cylindrical record-film of a tough and durable material and having such tenuity that in itself it will have no sound reproduction -if unsupported is supported upon an intermediate carrying-mandrel of a nature that will efficiently support such record-film and which at the same time will materially aid in a faithful reproduction of the true and natural tones without any of the harsh and metallic qualities usual to the older type of permanent phonograph-records, all as will hereinafter more fully appear, and be more particularly pointed out in the claims.

In the accompanying drawings, illustrative of the present invention, Figure 1 isa. detail longitudinal sectional elevation illustrating the present improvement applied to the tapering carrying spindle or mandrel of a phonograph. Fig. 2 is a side elevation of the submandrel of the present invention. Fig. 3 is a side elevation of the permanent cylindrical record-film. Fig. 4 is an end elevation of the submandrel aforesaid.

Similar numerals of reference indicate like parts in the several views.

In the present type of permanent pheno graph-records. as heretofore proposed the permanent cylindrical record-film of celluoid or like tough and enduring material was carried by a submandrel of sheet metal, wood, or other hard material, and as so formed and arranged im a'rted to the sound reproduction harsh an grating qualities which greatly impaired thepra'ctical value and usefulness of such records. 4

With a view to the avoidance of the abovestated defects the present invention consists in the formation of the submandrel aforesaid of a material having a density closely approximatlng that of an ordinary wax phonograph-record, as extended practical experiment has shown that a cylindrical recordfilm of celluloid or the like supported on a submandrel of a density closely approximating that of an ordinary wax recordwill reproduce faithfully the true and natural tones without any harsh or metallic qualities and equal in all particulars to the reproductions from an ordinary wax. record and be at the same' time practically indestructible.

Referring to the drawings, 1 represents a portion of the tapering spindle or mandrel of a phonograph. r

2 is a cylindrical record-film of celluloid or like tough and durable material and of such tenuity that when unsupported it will have no sound reproduction in itself, and in consequence of whichthe film when mounted as hereinafter set forth will not have substance enough in itself to impart the harsh and grating tone to the reproduction which an ordinary thick shell of celluloid or other like hard and durable material would. Other advantageous features of such attenuated film are that a more accurate and perfect record can be molded u 'on the surface thereof than could be effectedrupon the ordinary thick celluloid records heretofore found on the market. Economy of manufacture also results owing to the small quantity of high-grade celluloid required for each record.

3 is the submandrel, having the usual taper ing bore adapted to fit the phonograph spindie or mandrel 1, and a cylindrical periphery upon which the'cylindrical record-film 2 is shrunk or'other-wise secured in any usual and suitable inanne'r. In thepresent improvement such submandrel 3 is formed of woodpulp or other allied fibrous or like bodies molded into the required shape and brought to a density closely approximating that of the Wax employed in the manufacture of ordinary wax phonograph-records either by pressure aloneor by the saturation of such pulp-body with a wax or resin and the comquireddensity.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is

1. A phonograph-record comprising a permanent cylindrical record-film of celluloidlike material, so thin as to be of itself incapable of sound reproduction, and a support upon which said film is mounted, the said support being formed of a plastic material rigid enough to support said film and having a density closely approximating that of-the- Wax employed in the manufacture of Wax records.

2. A phonograph-record comprising a per- April, 1904.

manent cylindrical record-film of celluloidlike material, so thin as to be of itself incapa 'ble of sound re roduction, and a support film is mounted, the said support being formed of Wood-pulp and a upon which sai plastic material and having a density closely approximating that of the wax employed in the manufacture of Wax records;

3. A phonograph-record comprising a permanent cylindrical record-film of celluloidlike material so thin as to be of itself incapable of sound reproduction, and a support upon which said film is mounted, the said support being formed of wood-pulp saturated with a wax-like material and having a densityclosely approximating that of the Wax employed in the manufacture of Wax records.

Signed at Chicago, Illinois, this 6th day of VARIAN M. HARRIS. Witnesses:

ROBERT BURNS, M. H.'HoLMEs. 

